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Sonnet eGFX Breakaway Box 350 vs Sonnet eGFX Breakaway Box 650: Comparison
eGFX Breakaway Box 350 vs eGFX Breakaway Box 650: the host power delivery difference
The gap that matters here is host power delivery: eGFX Breakaway Box 350 15 W against eGFX Breakaway Box 650 87 W, which puts eGFX Breakaway Box 650 83% ahead. Add psu wattage to that, 350 W on the eGFX Breakaway Box 350 versus 650 W on the eGFX Breakaway Box 650, and the pattern holds. Max gpu length runs the same way, 220 mm on the eGFX Breakaway Box 350 versus 310 mm on the eGFX Breakaway Box 650, another win for eGFX Breakaway Box 650.
eGFX Breakaway Box 350 vs eGFX Breakaway Box 650: which one fits your build
The eGFX Breakaway Box 350 is the one to take for buyers who specifically want a quieter Noctua-fan enclosure and compact desk setups where a full double-wide box is overkill, though it is the wrong buy for buyers wanting real laptop charging power (only 15W here) and anyone chasing high frame rates on a modern RTX card. It also earns its place with video editors running single-slot acceleration cards for Avid HDX or similar workflows. Avoid it for any double-wide gaming GPU, since the chassis physically won't fit one. The eGFX Breakaway Box 650 suits RTX 3060/3070-class double-wide card builds on Thunderbolt 3. The same goes for Mac users wanting official Apple eGPU certification on a mid-tier budget. It is not the one for RTX 3080 Ti/3090 or RTX 40-series cards that want more PSU headroom.
Which is cheaper, eGFX Breakaway Box 350 or eGFX Breakaway Box 650?
At the last price check the eGFX Breakaway Box 350 was $299 and the eGFX Breakaway Box 650 $449, a 50% premium.
Frequently asked questions
Do the eGFX Breakaway Box 350 and eGFX Breakaway Box 650 differ on cooling type?
Yes. Cooling Type reads Active, ultra-low-noise Noctua fan on the eGFX Breakaway Box 350 versus Active Fan on the eGFX Breakaway Box 650.
Is the Connection Standard the same on the eGFX Breakaway Box 350 and eGFX Breakaway Box 650?
It is. Both are listed at Thunderbolt 3, so it is not a reason to pick one over the other.
Specs and benchmarks
Brand
- Sonnet eGFX Breakaway Box 350
- Sonnet
- Sonnet eGFX Breakaway Box 650
- Sonnet
Connection Standard
- Sonnet eGFX Breakaway Box 350
- Thunderbolt 3
- Sonnet eGFX Breakaway Box 650
- Thunderbolt 3
Model Number
- Sonnet eGFX Breakaway Box 350
- eGFX Breakaway Box 350
- Sonnet eGFX Breakaway Box 650
- eGFX Breakaway Box 650
Extra Ports
- Sonnet eGFX Breakaway Box 350
- None onboard beyond the GPU's own outputs
- Sonnet eGFX Breakaway Box 650
- None onboard beyond the GPU's own outputs
PSU Wattage
- Sonnet eGFX Breakaway Box 350
- 350 W-46%
- Sonnet eGFX Breakaway Box 650
- 650 WBest
Host Power Delivery
- Sonnet eGFX Breakaway Box 350
- 15 W-83%
- Sonnet eGFX Breakaway Box 650
- 87 WBest
Max GPU Length
- Sonnet eGFX Breakaway Box 350
- 220 mm-29%
- Sonnet eGFX Breakaway Box 650
- 310 mmBest
Cooling Type
- Sonnet eGFX Breakaway Box 350
- Active, ultra-low-noise Noctua fan
- Sonnet eGFX Breakaway Box 650
- Active Fan
GPU Compatibility
- Sonnet eGFX Breakaway Box 350
- Single-slot cards, GTX 1050 Ti to mid-range single-slot workstation and gaming cards
- Sonnet eGFX Breakaway Box 650
- GTX 10-series through RTX 30-series and equivalent AMD cards, double-wide
Price
- Sonnet eGFX Breakaway Box 350
- Launched around $299 (2017)
- Sonnet eGFX Breakaway Box 650
- Launched around $449 (2018)
Which one should you pick?
Choose Sonnet eGFX Breakaway Box 350 if you already have it on hand or find it at a lower price.
Choose Sonnet eGFX Breakaway Box 650 if you want the higher PSU wattage (650 W vs 350 W), the higher host power delivery (87 W vs 15 W) and the higher max GPU length (310 mm vs 220 mm).
Price comparison
| Retailer | Sonnet eGFX Breakaway Box 350 | Sonnet eGFX Breakaway Box 650 |
|---|---|---|
| Full Compass | $299.00 View on Full Compass | |
| Amazon | $449.00 View on Amazon |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Verdict
Sonnet eGFX Breakaway Box 350
6 / 10 Expert Rating
A niche but well-executed pick for single-slot cards and quiet operation, not for gaming-class GPUs.
Sonnet eGFX Breakaway Box 650
7 / 10 Expert Rating
The right-sized Sonnet box for mid-range Thunderbolt 3 cards, officially Mac-certified.